Cách tạo đường dẫn không dấu và sửa lỗi tiếng Việt trong Title Alias của Joomla! 2.5 vs 3.0

public static function stringURLSafe($string)
   {
      // remove any '-' from the string since they will be used as concatenaters
      $str = str_replace('-', ' ', $string);

      $lang = JFactory::getLanguage();
      $str = $lang->transliterate($str);

      // Trim white spaces at beginning and end of alias and make lowercase
      $str = trim(JString::strtolower($str));

      // Remove any duplicate whitespace, and ensure all characters are alphanumeric
      $str = preg_replace('/(\s|[^A-Za-z0-9\-])+/', '-', $str);

      // Trim dashes at beginning and end of alias
      $str = trim($str, '-');

      return $str;
   }

   public static function stringURLSafe($string)
   {
      $trans = array(
      "đ"=>"d","ă"=>"a","â"=>"a","á"=>"a","à"=>"a",
      "ả"=>"a","ã"=>"a","ạ"=>"a",
      "ấ"=>"a","ầ"=>"a","ẩ"=>"a","ẫ"=>"a","ậ"=>"a",
      "ắ"=>"a","ằ"=>"a","ẳ"=>"a","ẵ"=>"a","ặ"=>"a",
      "é"=>"e","è"=>"e","ẻ"=>"e","ẽ"=>"e","ẹ"=>"e",
      "ế"=>"e","ề"=>"e","ể"=>"e","ễ"=>"e","ệ"=>"e",
      "í"=>"i","ì"=>"i","ỉ"=>"i","ĩ"=>"i","ị"=>"i",
      "ư"=>"u","ô"=>"o","ơ"=>"o","ê"=>"e",
      "Ư"=>"u","Ô"=>"o","Ơ"=>"o","Ê"=>"e",
      "ú"=>"u","ù"=>"u","ủ"=>"u","ũ"=>"u","ụ"=>"u",
      "ứ"=>"u","ừ"=>"u","ử"=>"u","ữ"=>"u","ự"=>"u",
      "ó"=>"o","ò"=>"o","ỏ"=>"o","õ"=>"o","ọ"=>"o",
      "ớ"=>"o","ờ"=>"o","ở"=>"o","ỡ"=>"o","ợ"=>"o",
     "ố"=>"o","ồ"=>"o","ổ"=>"o","ỗ"=>"o","ộ"=>"o",

      "ú"=>"u","ù"=>"u","ủ"=>"u","ũ"=>"u","ụ"=>"u",
      "ứ"=>"u","ừ"=>"u","ử"=>"u","ữ"=>"u","ự"=>"u",
      "ý"=>"y","ỳ"=>"y","ỷ"=>"y","ỹ"=>"y","ỵ"=>"y",
      "Ý"=>"Y","Ỳ"=>"Y","Ỷ"=>"Y","Ỹ"=>"Y","Ỵ"=>"Y",
      "Đ"=>"D","Ă"=>"A","Â"=>"A","Á"=>"A","À"=>"A",
      "Ả"=>"A","Ã"=>"A","Ạ"=>"A",
      "Ấ"=>"A","Ầ"=>"A","Ẩ"=>"A","Ẫ"=>"A","Ậ"=>"A",
      "Ắ"=>"A","Ằ"=>"A","Ẳ"=>"A","Ẵ"=>"A","Ặ"=>"A",
      "É"=>"E","È"=>"E","Ẻ"=>"E","Ẽ"=>"E","Ẹ"=>"E",
      "Ế"=>"E","Ề"=>"E","Ể"=>"E","Ễ"=>"E","Ệ"=>"E",
      "Í"=>"I","Ì"=>"I","Ỉ"=>"I","Ĩ"=>"I","Ị"=>"I",
      "Ư"=>"U","Ô"=>"O","Ơ"=>"O","Ê"=>"E",
      "Ư"=>"U","Ô"=>"O","Ơ"=>"O","Ê"=>"E",
      "Ú"=>"U","Ù"=>"U","Ủ"=>"U","Ũ"=>"U","Ụ"=>"U",
      "Ứ"=>"U","Ừ"=>"U","Ử"=>"U","Ữ"=>"U","Ự"=>"U",
      "Ó"=>"O","Ò"=>"O","Ỏ"=>"O","Õ"=>"O","Ọ"=>"O",

      "Ớ"=>"O","Ờ"=>"O","Ở"=>"O","Ỡ"=>"O","Ợ"=>"O",
      "Ố"=>"O","Ồ"=>"O","Ổ"=>"O","Ỗ"=>"O","Ộ"=>"O",
      "Ú"=>"U","Ù"=>"U","Ủ"=>"U","Ũ"=>"U","Ụ"=>"U",
      "Ứ"=>"U","Ừ"=>"U","Ử"=>"U","Ữ"=>"U","Ự"=>"U",);
      
        //remove any '-' from the string they will be used as concatonater
        $str = str_replace('-', ' ', $string);

      $str = strtr($str, $trans);
        $lang =& JFactory::getLanguage();
        $str = $lang->transliterate($str);

        // remove any duplicate whitespace, and ensure all characters are alphanumeric
        $str = preg_replace(array('/\s+/','/[^A-Za-z0-9\-]/'), array('-',''), $str);

       // lowercase and trim
 

     $str = trim(strtolower($str));
       return $str;
      }